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T. V. ALLIS. .BARBED METALLIC FENCING.

-1\T0.446,558. Patented Feb. 17,1891.

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THOMAS V. ALLIS, OF NElV YORK, N. Y.

BARBED METALLIC FENCING.

SPECIFICATION forming part of Letters Patent No. 446,558, dated February17, 1891. Application filed June 10, 1889. Serial No. 313,782. (Nomodel.)

To all whom it may concern:

Be it known that I, THOMAS V. ALLIS, a citizen of the United States, anda resident of New York city, in the county and State of New York, haveinvented new and useful Improvcments in Barbed Metallic Fencing, ofwhich the following; is a specification.

My invention relates to barbed metallic fencing havinglateraliy-projecting barbs produced at intervals along one edge bycutting into and along the strip so as to separate narrow spurs a shortdistance along the strip and bending them laterally some in onedirection and some in another. I

My invention consists of a strip of this character having certainpeculiarities of construction and relative arrangement of the barbs,wherebybarbs of the required length, distance apart, and preferred formof taper point are produced, and the strip is more favorably adapted fortwisting than strips of this character heretofore made, all ashereinafter fully described, reference being made to the accompanyingdrawings, in which Figure 1 is a side view of the strip, showingpreparatory to the bending of the barbs to project them laterally. Fig.2 is an edge view of the same after the barbs have been cut and bent;Fig. 3, a side view of the barbed and twisted strip in the completeform.

I take a plain fiat strip a of the usual size and form for such fencingand make longitudinal slits I) through it at intervals in a line nearerone edge than the other, according to the required width of thelaterally-projecting barbs that I wish to produce, said slits divergingin the middle portion to the outer edge of the strip by the converselyoblique lines I), thus producing barb-spu rs cl, partlyseparated fromthe strip, having points tapered to the outer edges and constituting thelaterally-projecting barbs of Figs. 2 and 3, (when subsequently bentlaterally to the strip,) together with the blunt A-shaped points 6,remaining on the edge of the strip midway between the barbs, which takenfrom between the points of the barbs enables the barbs to be located alittle farther apart on the strip for a given length of barb than if thebevel sides of the barb-points were cut from each other so as not toleave said points e. The barb-points thus cut from theconversely-inclined sides of these points 6 are both tapered from theinner edge outward, whereas they are tapered reversely to each otherwhen out one from the other diagonally, so that every alternate point istapered from the outer edge inward, which is not so desirable, and thepoints e have an important effect in the twist of the strip, as willappear farther on. The distance of the slits b apart along the strip isthe length of two webs f, joining two barbs at their bases to the stripsand a short slit g between said basewebs, which I make, together with anotch h, cutting into said short slit from the edge, to facilitate thetwisting of the strip, also for removing surplus metal, and also forproducing more symmetrical appearance. It will be seen that a strip madewithout the points 6 intermediate to the barbs d would be weakest in itstorsional strength and would twist most at the middle of the space andbut very little at the short slit between the bases of the barbs, whilewith the intermediate points as I make it the said middle portion is sostrengthened that the twist is distributed between the shorter spaceseach side, and these, having greater torsional resistance, cause moretwist to take effect at the slits 9 between the bases of the barbs, andthus the twist is much more uniform in a strip having wide and narrowparts in alternate succession than it otherwise would be. Theseintermediate points also render the narrow part of the strip between thebarbs more conspicuous to sight. These points may be variously shaped atthe outer extremity, as shown in the drawings. They are not intended toserve the purpose of barbs.

In my pending application, Serial No. 313,780, filed at the same timewith this, I

have represented and claimed fencing having laterally-projecting barbsand intermediate A-shaped barbs, also such fencing twisted, and I do notclaim these devices in this case; and in another pending application,Serial No. 313,781, also filed at the same time, I have represented andclaimed barbed fencing in which the integral barbs projecting from theedge of a thin flat strip are produced in couples from-opposite ends ofadjoining base-webs, joining them to the strip and separated by a notchbetween them, also such strips having short slits at the bottom of thenotches, and also being twisted, and I do not claim these devicesherein.

In my companion application, Serial No. 313,781, I have claimedfencing-strips having substantially the same form oflaterally-projecting barbs, but without the intermediate pointsprojecting in the plane of the strip, to which my claims are limited inthis case.

WVhat I claim, and desire to secure by Let: ters Patent, is

1. The improved barbed fencing consisting of a plain fiat strip havingpairs or couples of laterally-projecting barbs at intervals along oneedge and points intermediate to said pairs or couples of barbsprojecting from the same 20 edge in the plane of the strip and beingslitted at the bot-toms of the notches, and also twisted, substantiallyas described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 8th day of June, 1889.

THOMAS V. ALLIS.

Witnesses:

WILFRED B. EARLL, W. J. MORGAN.

